Weed control with Roundup

[greendoctor]

How true. Traces of 2,4-D or Triclopyr are used as growth regulators or auxin mimics in tissue culture. That saying "the dose makes the poison" is true in this case.

[ChuckPMi]

<<It may not say "growth regulator" but what is chemical mowing?>>
We could call that growth regulation and if you totally kill the plant, we could call that growth regulation since it has totally stopped growth and you could call water a growth regulator since more water makes grass grow faster. It is not the herbicide industry or the Purdue University definition of "mode of action" and it probably doesn't matter unless you are concerned with herbicide resistance or it is on your herbicide licensing exam. The Michigan herbicide applicator core manual does not have any information on which herbicides have which mode of action.

[cgaengineer]

Originally Posted by ChuckPMi

<<It may not say "growth regulator" but what is chemical mowing?>>
We could call that growth regulation and if you totally kill the plant, we could call that growth regulation since it has totally stopped growth and you could call water a growth regulator since more water makes grass grow faster. It is not the herbicide industry or the Purdue University definition of "mode of action" and it probably doesn't matter unless you are concerned with herbicide resistance or it is on your herbicide licensing exam. The Michigan herbicide applicator core manual does not have any information on which herbicides have which mode of action.

If chemical mowing keeps you from physically mowing the grass with a mower it has regulated the growth of the grass. Thus it would be considered a growth regulator.
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[Ric]

Originally Posted by greendoctor

The other way to do chemical mowing is much more dramatic. Imagine applying enough paraquat or diquat to top kill the grass, but allowing it to grow back. That is the other degree of chemical mowing that is done in orchards or vinyards.

Florida Citrus farmer are using two Boom Two Tank system in the groves. Citrus likes bare ground due to Oxygen demand by the roots. Therefore one pass with killing strength Glyphosate is used under the tree's drip line and Chemical Mowing rate is used between the Trees. With 55 inches of rain per year erosion is a concern. Citrus can take a certain amount of Glyphosate without causing stress. Young Trees are susceptible Glyphosate if sprayed to Heavy.

An other Diquat method of Chemical mowing is a DRAG. This can be made many different ways. I like the Thick wall 3" PVC pipe as a reservoir. Rope wicks are attached in holes in the pipe. As this is drug across the turf only the tops of the grass are burned down. This has a big advantage because it uses very little product and only burns the tops of the Grass. Once again we need erosion control because of our Rainy season. The Drag can also be made adjustable to a certain height just like a mower.

Of course it should be obvious to any Individual with normal mentality that Roundup as a PGR is best used on Utility Turf and Not fine turf.

.

[Florida Gardener]

Originally Posted by Ric

Florida Citrus farmer are using two Boom Two Tank system in the groves. Citrus likes bare ground due to Oxygen demand by the roots. Therefore one pass with killing strength Glyphosate is used under the tree's drip line and Chemical Mowing rate is used between the Trees. With 55 inches of rain per year erosion is a concern. Citrus can take a certain amount of Glyphosate without causing stress. Young Trees are susceptible Glyphosate if sprayed to Heavy.

An other Diquat method of Chemical mowing is a DRAG. This can be made many different ways. I like the Thick wall 3" PVC pipe as a reservoir. Rope wicks are attached in holes in the pipe. As this is drug across the turf only the tops of the grass are burned down. This has a big advantage because it uses very little product and only burns the tops of the Grass. Once again we need erosion control because of our Rainy season. The Drag can also be made adjustable to a certain height just like a mower.

Of course it should be obvious to any Individual with normal mentality that Roundup as a PGR is best used on Utility Turf and Not fine turf.

.

Ric, when you used PGRs on St. Augustine, would it choke out weeds, mainly CG?
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[greendoctor]

Sadly, in my state, there is lots of vegetation that is mowed or string trimmed when it should be sprayed.

[Ric]

Originally Posted by diamondlandscaping

Ric, when you used PGRs on St. Augustine, would it choke out weeds, mainly CG?
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Because you aren't licensed, you wouldn't apply a PGR to turf. RIGHT.??? In fact every time you ask a question about spraying chemicals it is only for your own yard. RIGHT.

St Augustine is real sensitive to any Herbicide and PGR's are Herbicide. Primo I have found Redirect Growth and helps grow in niches or bald spots. Plug Jobs can also grow in quicker by using PGR like Primo the Redirect growth laterally instead of vertical.

Crab Grass is an annual and as such grows faster than Perennials. Therefore Crab Grass out competes St A. Primo rate is 4.5 to 6 oz per acre. I am not sure how much Crab Grass needs to regulate it's growth but it is a lot more and would kill St A.

PS. PGR only last so long, Then the plant has a Spring Back effect and grows extra fast as the PGR wears off.

.

[Florida Gardener]

Originally Posted by Ric

Because you aren't licensed, you wouldn't apply a PGR to turf. RIGHT.??? In fact every time you ask a question about spraying chemicals it is only for your own yard. RIGHT.

St Augustine is real sensitive to any Herbicide and PGR's are Herbicide. Primo I have found Redirect Growth and helps grow in niches or bald spots. Plug Jobs can also grow in quicker by using PGR like Primo the Redirect growth laterally instead of vertical.

Crab Grass is an annual and as such grows faster than Perennials. Therefore Crab Grass out competes St A. Primo rate is 4.5 to 6 oz per acre. I am not sure how much Crab Grass needs to regulate it's growth but it is a lot more and would kill St A.

PS. PGR only last so long, Then the plant has a Spring Back effect and grows extra fast as the PGR wears off.

.

You got it! I'm not even doing it on my own yard, just was curious cause I remember you mentioned before that you have used primo to redirect growth on st Augustine. That is one of the biggest downfalls to st Augustine IMO...very slow recovery rate. I've had yards that were fertilized and irrigated properly, as well as cut high enough that would still have weed outbreaks. CG would rear its head in certain areas and slowly take the area over. It seems that at some point on a st Augustine lawn, a re-sod is necessary in certain areas. Everytime I take care of my zoysia lawns, the more I love them... But yes, I am not applying pesticides...
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[pythons37]

I'm going to keep doing what I've been doingull it out. Too many cool wild critters walking around. Don't want to bother them. I swear some the turkeys around here are 4 feet tall.